Regex to *not* match any characters

Question

I know it is quite some weird goal here but for a quick and dirty fix for one of our system we do need to not filter any input and let the corruption go into the system.

Answer 1

A simple and cheap regex that will never match anything is to match against something that is simply unmatchable, for example: \b\B.

It's simply impossible for this regex to match, since it's a contradiction.

References

• regular-expressions.info\Word Boundaries
  • \B is the negated version of \b. \B matches at every position where \b does not.